I am looking for a book which tells the story of two worlds.

One of the worlds is very small and the other is very large (relatively to each other). The large one was I think populated with humans.

They try to communicate but the time scale in the two worlds is drastically different: a short time on the large one is orders of magnitude longer on the other one. This means that whatever is passed from one to the other will span generations.

The small world was dying I think.

There was a second book which describes the second phase of their interactions, after both sides understood the time rate difference and its implications.


1 Answer 1


Sounds a lot like Dragon's Egg and Starquake by Robert L. Forward.

Per Wikipedia

Dragon's Egg is a hard science fiction novel written by Robert L. Forward and published in 1980. In the story, Dragon's Egg is a neutron star with a surface gravity 67 billion times that of Earth, and inhabited by cheela, intelligent creatures the size of a sesame seed who live, think and develop a million times faster than humans. Most of the novel, from May to June 2050, chronicles the cheela civilization beginning with its discovery of agriculture to advanced technology and its first face-to-face contact with humans, who are observing the hyper-rapid evolution of the cheela civilization from orbit around Dragon's Egg.

  • This is exactly the book I was looking for, thank you!
    – WoJ
    Jun 6, 2016 at 19:14
  • Sounds like an interesting story.
    – iMerchant
    Jun 6, 2016 at 19:51
  • Previously identified as the answer to this question and this one; also this one but the answer was not accepted.
    – user14111
    Jun 6, 2016 at 20:09

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